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Hydrological Applications of Satellite Snow Cover mapping

Abstract

In snow hydrology the importance of runoff modelling has been recognized even before remote sensing techniques became available. The areal extent of the seasonal snow cover is the main input variable for snowmelt runoff modelling. Based on Landsat, SPOT and NOAA/AVHRR data, runoff has been computed and forecasted in 13 basins of the Swiss Alps by the SRM model, apart from another 100 basins around the world. Satellite snow cover monitoring also serves for determining the duration of the snow cover, the areal water equivalent, as well as to evaluate the effect of a changed climate on snow conditions and runoff. A computer program is designed to exploit archived satellite data for evaluations of the snow accumulation in the past years.